Abstract: A power on/off control circuit and an electronic device is provided, the circuit including: a switching element, a first semiconductor switching circuit including a first semiconductor switching element, a second semiconductor switching circuit including a second semiconductor switching element, and a holding circuit connected between a first terminal of the first semiconductor switching element and a second terminal of the second semiconductor switching element. When the switching element is closed, the first semiconductor switching element is turned on. When the first semiconductor switching element is turned on, the second semiconductor switching element is turned on, and a power on signal is output via the second terminal of the second semiconductor switching element. When the second semiconductor switching element is turned on, the holding circuit is operable to maintain the on state of the first semiconductor switching element. The control circuit can stably lock a started state.

Abstract: A wheel unit for a vehicle includes a main housing configured to be coupled to a chassis of the vehicle, the main housing including first and second control arms. A transmission housing includes a body having first and second protrusions extending from the body, the first protrusion partially defining a first cavity that receives a portion of the first control arm, and the second protrusion partially defining a second cavity that receives a portion of the second control arm. A first pin is coupled between the first protrusion of the transmission housing and the first control arm of the main housing. A second pin is coupled between the second protrusion of the transmission housing and the second control arm of the main housing, the first and second pins defining a steering axis. The transmission housing is pivotably coupled to the main housing about the steering axis.

Abstract: A power on/off control circuit and an electronic device is provided, the circuit including: a switching element, a first semiconductor switching circuit including a first semiconductor switching element, a second semiconductor switching circuit including a second semiconductor switching element, and a holding circuit connected between a first terminal of the first semiconductor switching element and a second terminal of the second semiconductor switching element. When the switching element is closed, the first semiconductor switching element is turned on. When the first semiconductor switching element is turned on, the second semiconductor switching element is turned on, and a power on signal is output via the second terminal of the second semiconductor switching element. When the second semiconductor switching element is turned on, the holding circuit is operable to maintain the on state of the first semiconductor switching element. The control circuit can stably lock a started state.

Abstract: A multi-specification pliers with an easily replaceable clamping head includes a handle and a detachable clamping head connected to the handle; the handle comprises a handle insert arranged at the front end; a limit counter bore is processed on the handle insert, with the first bevel on the one side and the second bevel on the other side of the limit counter bore; the clamping head includes the third bevel arranged at the rear end; a limiting boss is processed on the clamping head side; the first bevel is matched to the third one; and the limit counter bore is matched to the limiting boss. The clamping head and handle can be connected quickly and stably for realizing multiple use of the handle, saving materials and costs, and solving the problem of the existing circlip pliers with a replaceable clamping head for not compatible with large-torque pliers.

Abstract: A wire stripper includes a right and left handle, the right and left handle are rotatably connected by a pin shaft, a jaw is provided on front surfaces of top portions of the right and left handle respectively, and a right and left movable plate are correspondingly provided on back surfaces of the top portions of the right and left handle respectively; and the wire stripper further comprises a damping assembly, the damping assembly comprises a damping seat and a torsion spring, the damping seat is connected to the right movable plate, the torsion spring is connected to the left movable plate, the torsion spring has two relatively opened torsion spring arms, the two torsion spring arms respectively abut against both sides of the damping seat, and the two torsion spring arms are opened and tightened by relative reciprocating sliding between the damping seat and the torsion spring arms.

Abstract: A wheel unit for a vehicle includes a main housing configured to be coupled to a chassis of the vehicle, the main housing including first and second control arms. A transmission housing includes a body having first and second protrusions extending from the body, the first protrusion partially defining a first cavity that receives a portion of the first control arm, and the second protrusion partially defining a second cavity that receives a portion of the second control arm. A first pin is coupled between the first protrusion of the transmission housing and the first control arm of the main housing. A second pin is coupled between the second protrusion of the transmission housing and the second control arm of the main housing, the first and second pins defining a steering axis. The transmission housing is pivotably coupled to the main housing about the steering axis.

Abstract: A jack for a vehicle includes a tube configured to be coupled to a chassis, and a cylinder assembly supported by the tube. The cylinder assembly includes a barrel and a rod at least partially received within the barrel. Actuation of the cylinder assembly causes the barrel to move relative to the tube in a first direction parallel to a longitudinal axis of the tube while the rod remains stationary relative to the tube. In some aspects, the jack further includes a locking device selectively received within the tube in a locked position. The locking device intersects the barrel's path to inhibit movement of the barrel in a second direction opposite the first direction when the locking device is in the locked position.

Abstract: A jack for a vehicle includes a tube configured to be coupled to a chassis, and a cylinder assembly supported by the tube. The cylinder assembly includes a barrel and a rod at least partially received within the barrel. Actuation of the cylinder assembly causes the barrel to move relative to the tube in a first direction parallel to a longitudinal axis of the tube while the rod remains stationary relative to the tube. In some aspects, the jack further includes a locking device selectively received within the tube in a locked position. The locking device intersects the barrel's path to inhibit movement of the barrel in a second direction opposite the first direction when the locking device is in the locked position.